Anti-friction bearing



(No Model.)

L. K. JBWETT. ANTI PRIGTION BEARING.

Patented Nov. 18, 1890.

. application,

LUTHER K. .lElVETT, OF BOSTON, il

PATENT OFFTCE.

IASSACHUSETTS, ASSIGNOR TO lllE JnwE'rT surrLY COMPANY, or PORTLAND,MAINE;

ANTi-,FmeTioN BEARING.

SPECIFICATION forming part of Letters `fina/tent No. 440,711, datedNovember 1B, 1890.

` Application filed March 18, 1890.

To all whom t may concern:

Be it known that-I, LUTHER K. JEWETT, of Boston, county of Sudolk, Stateof Massachusetts, have invented an Improvement in Anti-l FrictionBearings or Supports, ofwhich the following description, in connectionwith the accompanying drawings, is a specification, like letters on thedrawings representing like parts. p

This invention has for its object to provide a novelanti-frictionbearing, support, or device especially adapted, among otherthings, to be used between ear-bodies and their cartruc'ks as a sidebearing for the said car-body.

My present invention is an improvement upon that shown Vand described inanother Serial No. 336,636, tiled by me January ll, 1,890, and has forits objectto yimprove and simplify the construction of the same.

In accordance with my present invention the anti-friction bearing ordevice is composed of4A two 'substan tially parallel iiatbearing-surfaces, or more conically-shaped rollers interposed betweenthe said bearing-surfaces and provided at their opposite ends withgear-teeth to engage the rack-bars on the said bearing-surfaces, wherebyone or more of the said rollers .as to be tipped out' may be employed;The anti-friction rollers, when two or more are used, have preferablytro-operating with them a spacing-frame provided, as herein shown, witha toot-hor notch adapted to be engaged by a pawl'or locking projection'to hold the rollers in their'proper. osition, while the car-body andtheupper caring-surface attached thereto are lowered intol correct positionii the car-truck, to which thel lower bearingsurfaee issecured. Thelockingp'rojeotion or paw'l'is constructed so tended entirely around thesaidbearing-sur- 1 Linee, and preferably provided on its upper face witha recess ori-noove--intewhieh maybe placed feltL 'or 'other packing-nziater'iahlwith whiehthe ripper.` .bearingfsnrface'makes con- SerialNo. 344,419.

cach provided with a rack-bar, and one l the said rollers,

l of yengagement with the' notch Aer tooth in the spacing-framewhen'jthek ear-body'is lowered. The lower-bearing-surf vface isprovidcdwith `fan upright-flange ex- (No model.)

tion on its truck, the said packing material rendering the anti-frictionbearingdust-tight. My invent-ion in an anti-friction device thereforeconsists in the' combination, with two bearing-surfaces provided withrack-bars, 5 5

of one or more intermediate anti-friction rollers provided at itsopposite ends with gears lx to engage the rack-bars on thebearing-surfaces, substantially as will be described.

Other features of pointed out in the claims at the end of thisspecification. f

Figure l is a top or planview of the antifriction bearing with the upperbearing-surface removed; Fig. 2, a longitudinal section 65 of theanti-friction bearing, taken on the line 1ra', Fig. l; Fig. 3, atransverse section of the anti-frictioir bearing on line at', Fig. 2;Figs. 4 and 5, modifications to be referred to. The upperbearing-surfaceA and the A2, may be made of iron or sfcclor othersuitable material capable of withstanding Wear.

The upper and lower bearing-surfaces A A- are made flat or substantiallyparallel and 75 have interposed between them one or more anti-frictionrollers a, herein shown as conically shaped and provided' on itsopposite sides with gears a a2, which mesh with gear-teeth or rack-barsai on the upper and lower bear- 8o ing-surfaces, there preferably beingtwo rackbars on cach of said bearing-surfaces. Preferably eachbearingsurface will be provided with two rack-bars '/with which mesh thegears a c? of the rollers c. more anti-friction rollers a are used,a'spacing-frame b will preferably be employed with substantially asshown and described inthe application referred to, the lsaidspacing-frame being movable said rollers', it' being herein shown assupported "upon the arbors of the said rollers.

vThe spacing-frame b on one side, and preferably between the rollers` d,is provided with a notch ortooth b', adapted to receive oneg;

arm 2 of a lever b2, eXtended-througlra slot in the ange A?,thesaid'lever outside of the fiange A2 being' providedwith an vupturnedarm 3, which normally extends above the upper surface of the ilange A2,and is adapted toV ,roe4

my invention will be 6o` lower 7o lbearing-surface A', provided with theupright When two or 85 with the 9o be engaged by the upperbearing-surface A when the latter is loweredqnpon the anti-frictionrollers a, the said lever being' tipped, so as to disengage the arm .2from the notch or tooth b of the spacing-frame,therebyleaving the saidspacing-frame and the anti-friction rollers free to move.

lThe rack-bars a3 are preferably provided with teeth rounded at theirends to engage round-shaped teeth of the gears a a', as clearly shown inFig. 5, so that when the` upper bearing-surface is lowered down intoengagementinvention ,in this respect, as a single roller provided withgears at its opposite ends may be used with good results.,

When a single roller is used, it will preferably be provided with anextended 'arbor c, as shown in Fig. 4, which arbor is provided with anotch c', adapted to receive an arm 2 of the locking pawl or lever b2,so that the said yroller may be maintained in correct position While thecar-body is being lowered upon its truck'.

In order to render the anti-friction bearing,r or 4device substantiallydust-tight, preferably the flange .A2 is provided on its uppersurfacewith a groove or channel c2, into which-is laid a packingl c, of felt orother textile or suitable material, with which the upper bearingsurtaoecomes incontact when in proper Working position.

I have herein shown tneflange A? las -secured to or forming part of thelower bear? ing-surface; but I do not'desire to limit myself inv thisrespect, as it is manifestly evident that the said flange may be securedto or form part of the upper bearing-surface.-

l. In an anti-friction bearing or support, the combination, with twobearing-surfaces provided with rack-bars', of one o r more intermediateanti-friction rollers provided at its opposite ends with gears to engagethe rack-bars on the bearinLr-surfaces, substantially as described.

"2. In an anti-friction bearing or support, the combination, with twobearing-surfaces provided with rack-bars, of one or more intermediateanti-friction rollers provided at its 'opposite ends with gears toengage the rack'- bars on the bearing-surfaces, and a locking device tohold said rollers` in proper working position, substantially asdescribed.

3. In an anti-friction bearingor support, l

thc combination, with two bearingsurt'aces provided with rack-bars, otone or more intermediate anti-friction rollers provided at its oppositeends with gears to engage the rackbars on the bearin0surfaces,aspacing-frame movable with the rollers, and alocking device to engagesaid spacin g-f rame, substantially as described.

4:. In an anti-friction bearing orY support, the combination, with twoflat bearing-surfaces provided with rack-bars, a flange A2,secured to orforming part of one ot said bearing-surfaces, and a packing interposedbetween the said flange and one of the-bearingsurfaces, ofananti-friction interposed between said surfaces and pro,- vided withgears to.engage said i'aclrbais, substantially as described.

5. In an anti-friction bearing` or support, the combination, With twoflat bearing-surfacesa `iia'nge A2, secured to or forming part of one-ofsaid surfaces, and a packing interposed -between said flange Aandbearing-surface-.of an anti-friction device or roller interposedbetweenthe said bearing-surfaces, substantially' asdescribed.

-lnte'stimony whereof l have signed my name to this 'spec-iti'cation'inthepresence*of*4 two subscribing witnesses' in rima 1. 'JEWET'Witnesses:

JAS. H. CHURCHILL, EMMA- J. BENNETT.

roller or rollers

